COURSE of the MONTH

Google Base XML file format

I am trying to prepare a XML file for uploading to Google Base (www.google.com/base) , but am not having much luck. Below is a snippet of the code I have been using. The error message I get is "Data feed upload failed. No items are live."

I cant find an example of a full working XML file that I know works on Google base to follow. So am unsure what I am doing wrong. Perhaps I should be using some header and footer commands or code that I have omitted? Perhaps I need to place the attributes in a particular order?